Improvement in harrows



2 Sheets-Sheet 1;

M. S -BLAIR.

Harrow.

' Patented JuIy I, 1879.

'lifftcmeu.

N, PETERS, FHDTO-LITHOGRAPHER WASHINGTON. D c.

UNITED STATES PATENT OFFICE.

MILTON S. BLAIR, OF WARSAW, IOWA.

IMPROVEMENT IN HARROWS.

Specification forming part of Letters Patent No. 216,933, dated July 1,1879; application filed April 8, 1879.

To all whom it may concern:

Be it known that I, MILTON S. BLAIR, of Warsaw, Wayne county, State ofIowa, have invented certain new and useful Improvements in Harrows; andI hereby declare the same to be fully, clearly, and exactly described asfollows, reference being had to the accompanying drawings, in which-Figure 1 is a plan view of the device complete, and Figs. 2 and 3 sideelevations of the harrows.

My invention relates, in particular, to cornharrows; and consists in thecombination of a pair of small harrows adapted to pass between the rowsof corn with an ordinary cultivatorframe, and in certain details ofconstruction and combinations of parts, as hereinafter described.

In the accompanying drawings, Arepresents the ordinary bowed axle of acultivator, having tongue to, lateral braces a and i, and wheels B.

The axles at either side are perforated at intervals, and provided withpins 1) b, in order to effect a lateral adjustment of the harrows tosuit varying widths of the rows.

0 O are clips embracing the axle, to which the draft-beams of theharrows are secured by pins 0.

The harrows cl are triangular in shape, and are providedwith handles EE, similar to those of a plow, except that one of them is bent aroundtoward the other, in order to enable the driver to guide both harrowswhile walking in the path of one of them.

The harrows are readily directed by bearing up or down upon the handle,as the side receiving the pressure, being inclined to the line of draft,operates precisely after the manner of a rudder.

The beams to are extended behind the axle, and are perforated at a forthe attachment of hooks I, upon which the harrows are hung clear of theground when not in use.

The harrows are attached to the frame or axle A by means of draft-beamsD, and as the height of the axles of cultivators varies, it is necessaryto construct this beam in such manner as to admit of its forward endbeing vertically adjusted. Two means of accomplishing this are shown inFigs. 2 and 3. In the former, H H are a pair of standards, secured,respectively, upon the forward end of the barrow and upon itscross-timber, terminating above in jaws, (see Fig. 1,) which embrace theber, and being provided with nuts 0' above and below the same.

To raise the forward end of the beam, it is only necessary to run theupper nut up on the standard the required distance and screw up thelower one until the other jams against the top of the cross-timber.Lateral braces e c are provided to relieve the standard of lateralstrain.

I is a brace extending from the front of the harrow up through the beamD, where it is secured by anut, i, the object being to prevent unduestrain upon the standards H H as the harrow is drawn over the ground.

The construction shown in Fig. 3 is the mechanical equivalent for thatjust described in many respects.

The handle E is provided with lateral braces c 0, but is not verticallyadjustable. The draftbeam D, preferably metallic, is attached to across-beam, d, a .short distance behind the harrow-point. Through thelatter, and through a slot in the beam D, passes a pin, F, having a nut,f, above the beam. Below it a spring, K, embraces the pin and sustainsthe beam.

From the under side of the harrow extends a strong brace, G, having aslot, 9, through which passes a pin, g, secured to the beam. The slot gis formed in the arc of a circle described about the point of attachmentof the beam as a center, and the pin g is furnished with a clamping-nutfor securing the brace to the beam.

To raise or lower the end of the beam, it is only necessary to loosenthis nut and turn the nut f up or down on the'pin F.

Such is, in general terms, a description of the construction of thedevice. Its mode of operation will have been made evident therefrom.

being guided by the driver, who directs their The harrows are drawnbetween the rows,

1. In combination with the axle of a Wheelcultivator, the harrow d,having handle, as described, and provided With the draft-beam D, springK, and slotted brace G, substantially as set forth.

2. The harrow 01, having pin F, nut f, and spring K, in/combination withthe draft-beam D and slotted brace G, substantially as set forth.

MILTON S. BLAIR.

Witnesses W. H. (JAIN, W. J. HARLOW.-

